Global Journal of Technology and Optimization

ISSN: 2229-8711

Open Access

Toshihiko Yoshimura

Department of Mechanical Engineering, Sanyo-Onoda City University, 1-1-1 Daigaku-dori, Sanyo-Onoda, Yamaguchi, 756-0884, Japan

  • Research Article   
    Sonoluminescence from Ultra-High-Temperature and High-Pressure Cavitation and its Effect on Surface Modification of Cr-Mo Steel
    Author(s): Toshihiko Yoshimura*, Daisaku Maeda, Takayuki Ogi, Fumihiro Kato and Masataka Ijiri

    Sonoluminescence from various types of cavitation bubbles, namely those of water jet cavitation (WJC), water jet cavitation with a swirl flow nozzle (SFN-WJC), multifunction cavitation (MFC), ultrasonic cavitation (UC), and ultrahigh-temperature and highpressure cavitation (UTPC), wasinvestigated. The sonoluminescence measurements were compared with the surface modification characteristics imparted to Cr-Mo steel. The luminescence intensity of the various types of cavitation was measured using two types of photon counting head, whose detection sensitivity depends on the wavelength range. 2 UTPC had the highest light intensity, followed by MFC, UC, SFN-WJC, and WJC. The temperature inside the bubbles from the various types of cavitation could be estimated using the black-body emission method based on Planck’s law and the emission intensity, which was corrected for the sensitivity.. Read More»

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